Okay... I finally took the BIG LEAP from version 3.0.11 to 3.1.3. Unfortunately, this version is incompatible with 3.0.x, as a result of which the entire layout of heosemys.org is gone and none of the other pages on this site are visible. I will have to rewrite every page from scratch, but that is a task for another day.

The forum software has been upgraded to phpBB 3.2.5. This upgrade was long overdue. It was successful, but for the time being only the forum is functional, with the default phpbb-layout. It will take more time to get the rest of the site back online.
Let me know if there are any problems with the forum.